$OpenBSD: patch-src_main_cc,v 1.1 2017/04/25 14:47:48 espie Exp $
--- src/main.cc.orig	Tue Apr 25 16:44:22 2017
+++ src/main.cc	Tue Apr 25 16:44:30 2017
@@ -35,6 +35,7 @@
 #include "../version.h"
 
 #include <stdio.h>
+#include <stdlib.h>
 
 
 static void showHelp(int exitval) {
